# Trigonometric Series

> two-volume set of books by Antoni Zygmund

**Wikidata**: [Q104841732](https://www.wikidata.org/wiki/Q104841732)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Trigonometric_Series)  
**Source**: https://4ort.xyz/entity/trigonometric-series-q104841732